Dave - I like the sounds of your solution "power directly to the servo harness" instead of through the receiver. Are there any downsides to this that you are aware of? I didn't realize that the servos would provide power to the receiver. I wouldn't want a stalled or defective servo to crash the receiver. That could result in a crashed plane. If you could post a wiring diagram that would be appreciated. Thanks.

Dave - I like the sounds of your solution "power directly to the servo harness" instead of through the receiver. Are there any downsides to this that you are aware of? I didn't realize that the servos would provide power to the receiver. I wouldn't want a stalled or defective servo to crash the receiver. That could result in a crashed plane. If you could post a wiring diagram that would be appreciated. Thanks.

George

Don't know if other makes do the power plug to any input but airtronics has been doing this for a while . Makes it VERY convienient to place the battery/power source just about anywhere except behind the kitchen sink ? Not a problem at all as per Airtronics as the red and black wires are your positive and negative lines for power

Are there any downsides to this that you are aware of? I didn't realize that the servos would provide power to the receiver. I wouldn't want a stalled or defective servo to crash the receiver.

As long as there is a suitable voltage difference between the plus and minus pins of the receiver and the servos both will work (and "don't care how it was connected to them").

The difference is that in Dave's suggested Y-harness, the high currents for the wing servos don't go over the receiver board, whose flimsy pins and printed circuits are not suitable for high amps. The high currents are bypassed and the receiver just drains a little power for itself from the source.

You can imagine it also as follows: solder two cables to the battery, plug one into the receiver and connect the other one to the wing servos. The Y-harness is the same, just for the situation where you don't have free receiver pins for the battery connection.

If you have a defective wing servo, it will be fatal in both wiring schemes, as it shortcuts your battery and drains it. But an additional benefit of Daves Y-harness is that one can prevent a receiver melt-down when a wing servo makes a short circuit or stalls badly.

The only way to have redundancy would be two batteries, one supplying the wings and one the receiver and the tail servos. One would only connect the impulse leads of the wing servos to the receiver, so that the two supply sources are decoupled. This is the way it is done on the big F3AX aerobatic planes (or on their power boxes respectively).

Dave - I like the sounds of your solution "power directly to the servo harness" instead of through the receiver. Are there any downsides to this that you are aware of? I didn't realize that the servos would provide power to the receiver. I wouldn't want a stalled or defective servo to crash the receiver. That could result in a crashed plane. If you could post a wiring diagram that would be appreciated. Thanks.

powering wing servos directly off batt

im amazed at how many F3x installs still run the power for their wing servos directly off the Rx...the Rx is current limited (tiny pcb traces, low amperage circuit topology, etc.). i guess no one bought/seen Paul's F3 build clinic - the topic is well covered in his video.